LG A2UW18GFAB Owner's Manual
INSTALLATION MANUAL
AIR
ENGLISH ESPAÑOL
PORTUGUÊS
CONDITIONER
Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
Please retain this installation manual for future reference after reading it thoroughly.
This product contains Fluorinated Greenhouse Gases. (R410A)
Multi Standard
Original instruction
P/NO : MFL68883816
REV.00_012618
www.lg.com
Young children should be supervised to ensure that they do not
play with the air conditioner.
IMPORTANT SAFETY INSTRUCTIONS
3
ENGLISH
• Do not modify or extend the power cable. If the power cable or cord
has scrathes or skin peeled off or deteriorated then it must be
replaced. There is risk of fire or electric shock.
• For installation, removal or reinstall , always contact the dealer or an
Authorized Service Center. There is risk of fire, electric shock, explosion, or injury.
• Do not install the product on a defective installation stand. Be sure
that the installation area does not deteriorate with age. It may cause
product to fall.
• Never install the outdoor unit on a moving base or a place from where
it can fall down.
The falling outdoor unit can cause damage or injury or even death of a
person.
• In outdoor unit the step-up capacitor supplies high voltage electricity
to the electrical components. Be sure to discharge the capacitor completely before conducting the repair work.
An charged capacitor can cause electrical shock.
• When installing the unit, use the installation kit provided with the
product. Otherwise the unit may fall and cause severe injury.
• Indoor/outdoor wiring connections must be secured tightly and the
cable should be routed properly so that there is no force pulling the
cable from the connection terminals. Improper or loose connections
can cause heat generation or fire.
• Safely dispose off the packing materials. Like screws, nails, batteries,
broken things etc after installation or svc and then tear away and
throw away the plastic packaging bags. Children may play with them
and cause injury.
• Be sure to check the refrigerant to be used. Please read the label on
the product. Incorrect refrigerant used can prevent the normal operation of the unit.
Operation
• When the product is soaked (flooded or submerged) in water , contact
an Authorized Service Center for repair before using it again. There is
risk of fire or eletric shock.
• Be sure to use only those parts which are listed in the svc parts list.
Never attempt to modify the equipment. The use of inappropriate
parts can cause an electrical shock, excessive heat generation or fire.
• Do not touch , operate, or repair the product with wet hands. Hold the
plug by hand when taking out. There is risk of electric shock or fire.
IMPORTANT SAFETY INSTRUCTIONS
4
ENGLISH
• Do not place a heater or other heating appliances near the power
cable. There is risk of fire and electric shock.
• Do not allow water to run into electric parts. Install the unit away from
water sources. There is risk of fire, failure of the product, or electric
shock.
• Do not store or use or even allow flammable gas or combustibles near
the product. There is risk of fire.
• Do not use the product in a tightly closed space for a long time.
Perform ventilation regularly. Oxygen deficiency could occur and
hence harm your health.
• Do not open the front grille of the product during operation. (Do not
touch the electrostatic filter, if the unit is so equipped.) There is risk of
physical injury, electric shock, or product failure.
• If strange sound, smell or smoke comes from product.Immediately
turn the breaker off or disconnect the power supply cable. There is
risk of electric shock or fire.
• Ventilate the product room from time to time when operating it
together with a stove, or heating element etc. Oxygen deficiency can
occur and hence harm your health.
• When the product is not to be used for a long time, disconnect the
power supply plug or turn off the breaker. There is risk of product
damage or failure, or unintended operation.
• Take care to ensure that nobody especially kids could step on or fall
onto the outdoor unit. This could result in personal injury and product
damage.
• Take care to ensure that power cable could not be pulled out or damaged during operation. There is risk of fire or electric shock.
• Do not place ANYTHING on the power cable. There is risk of fire or
electric shock.
• When flammable gas leaks, turn off the gas and open a window for
ventilation befor turning on the product. Do not use the telephone or
turn switches on or off. There is risk of explosion or fire.
CAUTION
!
Installation
• Two or more people must lift and transport the product. Avoid personal injury.
• Do not install the product where it will be exposed to sea wind (salt
spray) directly. It may cause corrosion on the product.
IMPORTANT SAFETY INSTRUCTIONS
5
ENGLISH
• Install the drain hose to ensure that the condensed water is drained
away properly. A bad connection may cause water leakage.
• Keep level even when installing the product. To avoid vibration or
noise.
• Do not install the product where the noise or hot air from the outdoor
unit could damage or disturb the neighborhoods. It may cause a problem for your neighbors and hence dispute.
• Always check for gas (refrigerant) leakage after installation or repair of
product. Low refrigerant levels may cause failure of product.
• Please install safely at a place that can sufficiently endure the weight
of the product.
If the strength is not sufficient, the product may fall and cause injury.
Operation
• Do not use the product for special purposes, such as preserving
foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system. There is risk of damage or loss of property.
• Do not block the inlet or outlet of air flow. It may cause product failure.
• Use a soft cloth to clean. Do not use harsh detergents, solvents or
splashing water etc. There is risk of fire, electric shock, or damage to
the plastic parts of the product.
• Do not touch the metal parts of the product when removing the air filter. There is risk of personal injury.
• Do not step on or put anyting on the product. (outdoor units) There is
risk of personal injury and failure of product.
• Always insert the filter securely after cleaning. Clean the filter every
two weeks or more often if necessary. A dirty filter reduces the efficiency.
• Do not insert hands or other objects through the air inlet or outlet
while the product is operating. There are sharp and moving parts that
could cause personal injury.
• Be cautious when unpacking and installing the product. Sharp edges
could cause injury.
• If the refrigerant gas leaks during the repair, do not touch the leakaing
refrigerant gas. The refrigernat gas can cause frostbite (cold burn).
• Do not tilt the unit when removing or uninstalling it. The condensed
water inside can spill.
User must carry routine checkup & cleaning to avoid unit’s poor
performance.In case of special situation, the job must be carried out by
service person only.
TABLE OF CONTENTS
TABLE OF CONTENTS
7
ENGLISH
2 IMPORTANT SAFETY
INSTRUCTIONS
8 INSTALLATION
9 INSTALLATION OF
INDOOR, OUTDOOR
UNIT
9 Select the best location
10 Fixing Installation Plate
11 Piping length and elevation
11 Refrigerant charge
12 Drill a hole in the wall
12 INSTALLATION OF
WIRED REMOTE CONTROLLER
14 Wired remote controller installation
15 FLARING WORK AND
CONNECTION OF PIPING
15 Flaring work
16 Connection of piping - Indoor
18 Connection of piping - Outdoor
19 CONNECTING THE CABLE
BETWEEN INDOOR UNIT
AND OUTDOOR UNIT
19 Connect the cable to the Indoor unit
21 Connect the cable to the Outdoor unit
25 AIR PURGING AND EVAC-
UATION
25 Checking method
26 Evacuation
27 INSTALLATION PI485
28 TEST RUNNING
29 FUNCTION
29 Dip S/W Setting
30 Forced Cooling Operation
31 Wiring Error Check
31 Saving Power Consumption
32 Night Quiet Mode
33 Mode Lock
33 SLC (Smart Load Control) Mode
34 PCB Display(18/24 k Model Only)
35 MAX COMBINATION
CAPACITY
36 INSTALLATION GUIDE AT
THE SEASIDE
36 SEASONAL WIND AND
CAUTIONS IN WINTER
37 Airborne Noise Emission
37 Limiting concentration
23 CHECKING THE
DRAINAGE AND FORMING THE PIPINGS
23 Checking the Drainage
24 Forming the Piping
INSTALLATION
Installation plate
Type "B" screws
Type "A" screw (6 EA) Type "A" screw (8 EA) Type "A" screw (7 EA)
Holder Remote Control
Type "A" screw and plastic anchors
500(19-11/16) or less
8
ENGLISH
INSTALLATION
Installation Parts
Clearance of side discharge unit [Unit : mm(inch)]
Do not install the product where sufficient ventilation is not secured.
The performance may be decreased or the product may not be operated.
300(11-13/16)
or more
500(19-11/16) or less
600(23-19/32)
or more
600(23-19/32) or more
1000(39-3/8) or more
300(11-13/16)
500(19-11/16) or less
500(19-11/16) or less
or more
erom ro )8/3-93(0001
H
300(11-13/16)
1000(39-3/8)
or more
or more
D
L
h In case of series or another installation, please refer to related PDB.
0001 (39-3/8) or more
300(11-13/16)
or more
300(11-13/16)
or more
2000(78-3/4) or more
INSTALLATION OF INDOOR, OUTDOOR UNIT
More than 20cm
More than
10cm
More than 2.3m
More than
10cm
More than 20cm
More than
10cm
More than 2.3m
More than
10cm
More than 20cm
More than
10cm
More than 2.3m
More than
10cm
more than
70cm
more than
30cm
more than 60cm
more than
30cm
more than
60cm
INSTALLATION OF INDOOR, OUTDOOR UNIT
9
ENGLISH
Read completely, then follow step by step.
You need to select adequate installation location
considering the following conditions, and make
sure to acquire the consent of the user.
Select the best location
1 Do not have any heat or steam near the unit.
2 Select a place where there are no obstacles
3 Make sure that condensation drainage can be
4 Do not install near a doorway.
5
6 Use a stud finder to locate studs to prevent
Indoor unit
in front of the unit.
conveniently routed away.
Ensure the spaces indicated by arrows from the
wall, ceiling, fence or other obstacles.
unnecessary damage to the wall.
CAUTION
!
Install the indoor unit on the wall where
the height from the floors more than 2.3
meters. (ART COOL Type Only 1.5m)
Outdoor unit
1 If an awning is built over the unit to prevent
direct sunlight or rain exposure, make sure
that heat radiation from the condenser is not
restricted.
2 Ensure that the spaces indicated by arrows
around front, back and side of the unit.
3 Do not place animals and plants in the path of
the warm air.
4 Take the air conditioner weight into account
and select a place where noise and vibration
are minimum.
5 Select a place so that the warm air and noise
from the air conditioner do not disturb neighbors.
6 Place that can sufficiently endure the weight
and vibration of the outdoor unit and where
even installation is possible.
7 Place that has no direct influence of snow or
rain.
8 Place with no danger of snowfall or icicle
drop.
9 Place without weak floor or base such as
decrepit part of the building or with a lot of
snow accumulation.
10 Sufficient ventilation is secured.
Rooftop Installations
If the outdoor unit is installed on a roof structure,
be sure to level the unit. Ensure the roof structure and anchoring method are adequate for the
unit location. Consult local codes regarding
rooftop mounting.
10
Chassis
Hook
Installation Plate
Type “A”
Installation Plate
Type “A”
Installation Plate
Chassis
Hook
Type "A" Screws
Unit
Outline
Left Rear
Piping
Right Rear
Piping
Place a level on raised tab
(Unit : mm)
Installation plate
Ø65
Ø65
184
220
156
307
460 567
Chassis
Hook
Installation Plate
Type “A”
Installation plate
Left rear piping Right rear piping
Ø65
Ø65
105mm
105mm
65mm
55mm
45mm
140mm
Ø65
65mm65mm
65mm
45mm
Ø65
Installation plate
Left rear piping Right rear piping
Installation plate
Left rear piping Right rear piping
Ø65
133mm
101mm
101mm
Ø65
100mm
ENGLISH
INSTALLATION OF INDOOR, OUTDOOR UNIT
Fixing Installation Plate
The wall you select should be strong and solid
enough to prevent vibration
1 Mount the installation plate on the wall
with type "A" screws. If mounting the unit
on a concrete wall, use anchor bolts.
- Mount the installation plate horizontally
by aligning the centerline using a level.
<Type 1>
2 Measure the wall and mark the centerline.
It is also important to use caution concerning the location of the installation platerouting of the wiring to power outlets is
through the walls typically. Drilling the hole
through the wall for piping connections
must be done safely.
<Type 2>
Indoor Type
Wall mounted
<Type 1>
<Type 2>
<Type 3>
Capacity
(kBtu/h)
9, 12 1, 3
18 2, 4
Type
<Type 3>
<Type 4>
<Type 4>
INSTALLATION OF INDOOR, OUTDOOR UNIT
Piping length and elevation
Multiple Piping Models (Unit: m)
Phase
1Ø
Capacity
(kBtu/h)
18 30 20 15 7.5
24 50 25 15 7.5
36 75 25 15 7.5
Total Length
Max Length
(A/B)
Max Elevation
(h1)
In-In Elevation
(h2)
11
ENGLISH
A
h2
h1
B
Multiple Piping Type
CAUTION
!
Capacity is based on standard length and
maximum allowance length is on the
basis of reliability. If outdoor unit is at
higher elevation than the indoor units,
after 24m of vertical height, 1 oil trap is
required.
Refrigerant charge
The calculation of the additional charge should be taken in account for the length of extra pipe.
Multiple Piping Models (Unit: m)
Phase
1Ø
• Multiple Piping Models
Additional charge (g) = ((A Room Installation Length – Standard Length ) x 20g/m
h CF = Max. number of connectable indoor unit – Total number of connected indoor unit
Capacity
(kBtu/h)
18 7.5 20 30 20 20
24 7.5 25 50 22.5 20
36 7.5 25 75 37.5 20
Standard
Length (m)
+ (B Room Installation Length – Standard Length ) x 20g/m +.. )
- CF(Correction Factor) x 150
Max Piping for
one room (m)
Max total
Piping Length
Chargeless
Length
Charge (g/m)
Additional
INSTALLATION OF WIRED REMOTE CONTROLLER
2
2
1
3
3
<Wire guide grooves>
12
ENGLISH
Drill a hole in the wall
Drill the piping hole with a Ø65mm hole core drill. Drill the piping hole at either the right or the
left with the hole slightly slanted to the outdoor side.
WALL
Indoor
Outdoor
5-7mm
(3/16"~5/16")
INSTALLATION OF WIRED REMOTE CONTROLLER
1 Please fix tightly using provided screw after placing remote controller setup board on the
place where you like to setup.
- Please set it up not to bend because poor setup could take place if setup board bends.
Please set up remote controller board fit to the reclamation box if there is a reclamation box.
2 Can set up Wired remote controller cable into three directions.
- Setup direction: the surface of wall reclamation, upper, right
- If setting up remote controller cable into upper and right side, please set up after removing
remote controller cable guide groove.
h Remove guide groove with long nose.
① Reclamation to the surface of the wall
② Upper part guide groove
③ Right part guide groove
INSTALLATION OF WIRED REMOTE CONTROLLER
Please check if connector is normally connected.
Connecting cable
Indoor
Unit side
Wal l
Side
Wal l
Side
Wal l
Side
Wal l
Side
<Connecting order>
<Separating order>
3 Please fix remote controller upper part into the
setup board attached to the surface of the wall,
as the picture below, and then, connect with
setup board by pressing lower part.
- Please connect not to make a gap at the remote
controller and setup board’s upper and lower,
right and left part.
When separating remote controller from setup
board, as the picture below, after inserting into
the lower separating hole using screw driver and
then, spinning clockwise, remote controller is
separated.
- There are two separating holes. Please individually separate one at a time.
- Please be careful not to damage the inside
components when separating.
4 Please connect indoor unit and remote controller using connection cable.
13
ENGLISH
5 Please use extension cable if the distance between wired remote controller and indoor unit is
more than 10m.
CAUTION
!
When installing the wired remote controller, do not bury it in the wall.
(It can cause damage in the temperature sensor.)
Do not install the cable to be 50m or above.
(It can cause communication error.)
• When installing the extension cable, check the connecting direction of the connector of
• If you install the extension cable in the opposite direction, the connector will not be con-
• Specification of extension cable: 2547 1007 22# 2 core 3 shield 5 or above.
the remote controller side and the product side for correct installation.
nected.
INSTALLATION OF WIRED REMOTE CONTROLLER
14
ENGLISH
Wired remote controller installation
- Since the room temperature sensor is in the remote controller, the remote controller box should
be installed in a place away from direct sunlight, high humidity and direct supply of cold air to
maintain proper space temperature. Install the remote controller about 5ft(1.5m) above the floor
in an area with good air circulation at an average temperature.
Do not install the remote controller where it can be affected by:
- Drafts, or dead spots behind doors and in corners.
- Hot or cold air from ducts.
- Radiant heat from sun or appliances.
- Concealed pipes and chimneys.
- Uncontrolled areas such as an outside wall behind the remote controller.
- This remote controller is equipped with a seven segment LED. display. For proper display of the
remote controller LED's, the remote controller should be installed properly as shown in Fig.1.
(The standard height is 1.2~1.5 m from floor level.)
yes
no
no
5feet
no
(1.5meters)
Fig.1 Typical locations for remote controller
FLARING WORK AND CONNECTION OF PIPING
Copper
tube
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
15
FLARING WORK AND CONNECTION OF PIPING
Flaring work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the
following procedure.
Cut the pipes and the cable
- Use the piping kit accessory or the pipes purchased locally.
- Measure the distance between the indoor
and the outdoor unit.
- Cut the pipes a little longer than measured
distance.
- Cut the cable 1.5m longer than the pipe
length.
Burrs removal
- Completely remove all burrs from the cut
cross section of pipe/tube.
- Put the end of the copper tube/pipe in a
downward direction as you remove burrs in
order to avoid dropping burrs into the tubing.
Putting nut on
- Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube
having completed burr removal.
(not possible to put them on after flaring
work)
ENGLISH
Flaring work
- Carry out flaring work using flaring tool as
shown below.
Outside diameter
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1
Firmly hold copper pipe in a bar in the
dimension shown in the table below.
A
FLARING WORK AND CONNECTION OF PIPING
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
16
ENGLISH
Check
- Compare the flared work with figure below.
- If flare is noted to be defective, cut off the
flared section and do flaring work again.
Connection of piping - Indoor
Preparing the indoor unit's piping and drain hose for installation through the wall.
1 Route the indoor tubing and the drain hose in the direction of rear left or right
Drain hose
Drain hose
2 Tape the tubing, drain hose and the connecting cable. Be sure that the drain hose is located at
the lowest side of the bundle. Locating at the upper side can cause drain pan to overflow
inside the unit.
CAUTION
!
Tape
Connecting
pipe
Drain hose
Connecting cable
Tape
Connecting
pipe
Drain hose
Connecting cable
If the drain hose is routed inside the room, insulate the hose with an insulation material* so
that dripping from "sweating"(condensation) will not damage furniture or floors.
*Foamed polyethylene or equivalent is recommended.
FLARING WORK AND CONNECTION OF PIPING
Drain hose
Connecting
Indoor unit tubing
Flare nut
Pipings
Torque wrench
Indoor unit tubing
Spanner (fixed)
Connection pipe
Flare nut
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
Plastic bands
Insulation material
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Vinyl tape
(wide)
Wrap with vinyl tape
Indoor
unit pipe
Pipe
Indoor unit installation
Hook the indoor unit onto the upper portion of
the installation plate.(Engage the two hooks of
the rear top of the indoor unit with the upper
edge of the installation plate.) Ensure that the
hooks are properly seated on the installation
plate by moving it left and right.
Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots(clicking sound).
Connecting the pipings to the indoor unit and
drain hose to drain pipe
- Align the center of the pipings and sufficiently tighten the flare nut by hand.
- Tighten the flare nut with a wrench.
Outside diameter.
Torque
mm inch N.m
Ø6.35 1/4 16±2
Ø9.52 3/8 38±4
Ø12.7 1/2 55±6
Ø15.88 5/8 75±7
Ø19.05 3/4 110±10
- When extending the drain hose at the indoor
unit, install the drain pipe.
17
ENGLISH
Wrap the insulation material around the connecting portion.
- Overlap the connection pipe insulation mate-
- Wrap the area which accommodates the rear
rial and the indoor unit pipe insulation material. Bind them together with vinyl tape so that
there is no gap.
piping housing section with vinyl tape.
FLARING WORK AND CONNECTION OF PIPING
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
Ø12.7(1/2 inch) Connector
Outdoor unit
Main gas
side valve
Main liquid
side valve
Gas side piping
ROOM A
ROOM B
ROOM C
ROOM D
ROOM E
Liquid
side piping
18
ENGLISH
- Bundle the piping and drain hose together by
wrapping them with vinyl tape over the
range within which they fit into the rear piping housing section.
CAUTION
!
Installation Information (For right piping) For right piping, follow the instruction below.
Good case
Press on the upper side of clamp and unfold
the tubing to downward slowly.
Connection of piping - Outdoor
Align the center of the piping and sufficiently
tighten the flare nut by hand.
Connecting pipe order
1) ROOM A~E gas side pipe
2) ROOM A~E liquid side pipe
Finally, tighten the flare nut with torque wrench
until the wrench clicks.
- When tightening the flare nut with torque wrench
ensure the direction for tightening follows the arrow
on the wrench.
Outside diameter
mm inch N.m
Ø6.35 1/4 16±2
Ø9.52 3/8 38±4
Ø12.7 1/2 55±6
Ø15.88 5/8 75±7
Ø19.05 3/4 110±10
Torque
Bad case
Following bending type from left to right could
cause problem of pipe damage.
18 K
24 K
36 K
D
D
CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT
Connect the cable to the Outdoor unit
21
ENGLISH
1 Remove the cover control from the unit by
loosening the screw.
Connect the wires to the terminals on the
control board individually as the following.
2 Secure the cable onto the control board
with the holder (clamper).
3 Refix the cover control to the original posi-
tion with the screw.
4 Use a recongnized circuit breaker between
the power source and the unit. A disconnection device to adequately disconnect all
supply lines must be fitted.
1Ø Models
Capacity (kBtu/h) 18 24 36
Circuit Breaker (A) 15 20 25
CAUTION
!
After the confirmation of the above conditions, prepare the wiring as follows.
Outdoor unit
Terminal block
Over 15mm
Holder for
power supply
cord
Cover control
Power cord
Connecting cable
Loosen terminal screw
Terminal block
1 Never fail to have an individual power circuit specifically for the air conditioner. As for the
method of wiring, be guided by the circuit diagram posted on the inside of control cover.
2 Firmly tighten the terminal screws to prevent them loosening. After tightening, pull the
wires lightly to confirm that they do not move. (If they are loose the unit, the unit will not
operate normally or it can cause burn-out of the wires.)
3 Specification of power source.
4 Confirm that electrical capacity is sufficient.
5 See to that the starting voltage is maintained at more than 90 percent of the rated volt-
age marked on the name plate.
6 Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness.
7 Do not install an earth leakage circuit breaker in a wet or moist area.
8 The following would be caused by voltage drop.
- Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normal function of the overload.
9
The means for disconnection from a power supply shall be incorporated in the fixed wiring
and have an air gap contact separation of at least 3mm in each active(phase) conductors.
10 The Power cord connected to the unit should be selected according to the following
specifications.
CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT
Round pressure terminal
Power wire
Connect same thickness
wiring to both sides.
It is forbidden to connect
two to one side.
It is forbidden to
connect wiring of
different thicknesses.
22
ENGLISH
Precautions when laying power wiring
Use round pressure terminals for connections to the power terminal block.
When none are available, follow the instructions below.
- Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power
wiring may cause abnormal heat.)
- When connecting wiring which is the same thickness, do as shown in the figure below.
- For wiring, use the designated power wire and connect firmly, then secure to prevent outside
pressure being exerted on the terminal block.
- Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small
head will strip the head and make proper tighterning impossible.
- Over-tightening the terminal screws may break them.
CHECKING THE DRAINAGE AND FORMING THE PIPINGS
Downward slope
Do not raise
Water
leakage
Accumulated
drain water
Air
Waving
Water
leakage
Tip of drain hose
dipped in water
Water
leakage
Ditch
Less than
50mm gap
CHECKING THE DRAINAGE AND FORMING
THE PIPINGS
23
ENGLISH
Checking the Drainage
To check the drainage.
1 Pour a glass of water on the evaporator.
2 Ensure the water flows through the drain
hose of the indoor unit without any leakage and goes out the drain exit.
Connecting area
drain hose
Leakage
checking
Drain pan
Drain
hose
Leakage
checking
2 Do not make drain piping.
Drain piping
1 The drain hose should point downward for
easy drain flow.
24
• Trap is required to prevent water from entering
into electrical parts.
Plastic
band
Taping
Drain hose
Pipings
Connecting
cable
Power supply
cord
Seal a small opening
around the pipings
with gum type
sealer.
Seal a small opening
around the pipings
with gum type sealant.
Trap
Trap
ENGLISH
CHECKING THE DRAINAGE AND FORMING THE PIPINGS
Forming the Piping
Form the piping by wrapping the connecting
portion of the indoor unit with insulation material and secure it with two kinds of vinyl tape.
- If you want to connect an additional drain
hose, the end of the drain outlet should be
routed above the ground. Secure the drain
hose appropriately.
In cases where the outdoor unit is installed
below the indoor unit perform the following.
1 Tape the piping, drain hose and connecting
cable from down to up.
2 Secure the tapped piping along the exterior
wall using saddle or equivalent.
In cases where the Outdoor unit is installed
above the Indoor unit perform the following.
1 Tape the piping and connecting cable from
down to up.
2 Secure the taped piping along the exterior
wall. Form a trap to prevent water entering
the room.
3 Fix the piping onto the wall by saddle or
equivalent.
AIR PURGING AND EVACUATION
AIR PURGING AND EVACUATION
25
ENGLISH
The air and moisture remaining in the refrigerant system have undesirable effects as indicated below.
- Pressure in the system rises.
- Operating current rises.
- Cooling(or heating) efficiency drops.
- Moisture in the refrigerant circuit may freeze
and block capillary tubing.
- Water may lead to corrosion of parts in the
refrigeration system.
Therefore, after evacuating the system, take a
leak test for the piping and tubing between
the indoor and outdoor unit.
Checking method
Preparation
Check that each tube(both liquid and gas side
tubes) between the indoor and outdoor units
have been properly connected and all wiring
for the test run has been completed. Remove
the service valve caps from both the gas and
the liquid side on the outdoor unit. Check that
both the liquid and the gas side service valves
on the outdoor unit are kept closed at this
stage.
CAUTION
!
To avoid nitrogen entering the refrigerant
system in a liquid state, the top of the
cylinder must be higher than its bottom
when you pressurize the system. Usually,
the cylinder is used in a vertical standing
position.
- Do a leakage test of all joints of the
tubing(both indoor and outdoor) and both gas
and liquid side service valves.
Bubbles indicate a leak. Be sure to wipe off
the soap with a clean cloth.
- After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening
the charge hose connector at the nitrogen
cylinder. When the system pressure is
reduced to normal, disconnect the hose from
the cylinder.
Indoor unit
Manifold valve
Outdoor unit
Lo Hi
Pressure
gauge
Charge hose
Leakage test
Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to this
service port with charge hoses.
CAUTION
!
Be sure to use a manifold valve for leakage
test. If it is not available, use a stop valve for
this purpose. The "Hi" knob of the manifold
valve must always be kept close.
- Pressurize the system to no more than
551 P.S.I.G. with dry nitrogen gas and
close the cylinder valve when the gauge
reading reached 551 P.S.I.G. Next, test
for leaks with liquid soap.
Nitrogen gas
cylinder(in vertical
standing position)
26
Lo Hi
Manifold valve
Vacuum pump
Open
Open
Pressure
gauge
Indoor unit
Outdoor unit
ENGLISH
AIR PURGING AND EVACUATION
WARNING
!
Use a vacuum pump or Inert (nitrogen)
gas when doing leakage test or air purge.
Do not compress air or Oxygen and do
not use Flammable gases. Otherwise, it
may cause fire or explosion.
- There is the risk of death, injury, fire or
explosion.
Evacuation
- Connect the charge hose end described in
the preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve
is open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump. The
following table shows the time required for
evacuation.
Required time for evacuation when 30 gal/h
If tubing length is
less than 10m (33 ft)
Less than 0.5 Torr Less than 0.5 Torr
- When the desired vacuum is reached, close
the "Lo" knob of the manifold valve and stop
the vacuum pump.
Finishing the Job
vacuum pump is used
If tubing length is
longer than 10m (33
ft)
- Replace the valve caps at both gas and liquid
side service valves and fasten them tight.
This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.
- With a service valve wrench, turn the valve
stem of liquid side valve counter-clockwise to
fully open the valve.
- Turn the valve stem of gas side valve counterclockwise to fully open the valve.
- Loosen the charge hose connected to the gas
side service port slightly to release the pressure,
then remove the hose.
- Replace the flare nut and its bonnet on the gas
side service port and fasten the flare nut securely with an adjustable wrench. This process is
very important to prevent leakage from the system.
INSTALLATION PI485
Fix the PI485 PCB as shown in Fig.
Detailed installation method refer to PI485 Installation Manual.
24 kBtu/h
36 kBtu/h
INSTALLATION PI485
27
ENGLISH
TEST RUNNING
Bolt
Tubing connection
Discharge
temperature
Discharge air
Intake temperature
Discharge
temperature
Discharge air
Intake temperature
28
ENGLISH
TEST RUNNING
- Check that all tubing and wiring have been
properly connected.
- Check that the gas and liquid side service
valves are fully open.
Prepare remote control
Remove the battery cover by pulling it according to the arrow direction.
Insert new batteries making sure that the (+)
and (–) of battery are installed correctly.
Reattach the cover by pushing it back into
position.
NOTE
!
• Use 2 AAA(1.5volt) batteries. Do not
use rechargeable batteries.
• Remove the batteries from the remote
control if the system is not going to be
used for a long time.
- For reference, the gas side pressure of optimum condition is as below.(Cooling)
Refrigerant
R410A 35°C (95°F)
!
If the actual pressure are higher than
shown, the system is most likely overcharged, and charge should be removed.
If the actual pressure are lower than
shown, the system is most likely undercharged, and charge should be added.
The air conditioner is now ready for use.
Outside ambi-
ent TEMP.
NOTE
The pressure of
the gas side
service valve.
8.5~9.5kg/cm2G
(120~135 P.S.I.G.)
Evaluation of the performance
Operate unit for 15~20 minutes, then check
the system refrigerant charge:
- Measure the pressure of the gas side service
valve.
- Measure the temperature of the intake and
discharge of air.
- Ensure the difference between the intake
temperature and the discharge is more than
8°C.
FUNCTION
Dip S/W Setting
If you set the Dip Switch when power is on, the change in setting is not
applicable. The changing setting is enabled only when Power is reset.
FUNCTION
29
ENGLISH
Dip Switch
1234
Function
Normal Operation (No Function)
Forced Cooling Operation
Wiring Error Check
Saving Power Consumption (Step 1)
Saving Power Consumption (Step 2)
Mode Lock (Cooling)
Mode Lock (Heating)
Night Quiet Mode (Step 1)
Night Quiet Mode (Step 2)
Mode Lock (Cooling) + Night Quiet Mode (Step 1)
Mode Lock (Cooling) + Night Quiet Mode (Step 2)
Mode Lock (Cooling) + Saving Power Consumption (Step 1)
Mode Lock (Cooling) + Saving Power Consumption (Step 2)
Mode Lock (Heating) + Saving Power Consumption (Step 1)
Mode Lock (Heating) + Saving Power Consumption (Step 2)
SLC (Smart Load Control) Mode
WARNING
!
When you set the dip switch, you should turn off the circuit breaker or shut the power
source of the product down.
CAUTION
!
• Unless the applicable dip switch is set properly, the product may not work.
• If you want to set a specific function, request that the installer sets the dip switch appropriately
during installation.
30
DIP-SW
SW01N
ENGLISH
FUNCTION
18/24 (1Ø) kBtu/h
36 (1Ø) kBtu/h
Forced Cooling Operation
Adding the refrigerant in winter.
Setting Procedure
1 Set the Dip Switch as follow after shutting
the power source down.
2 Reset the power.
3 Check that the Red LED of PCB is on dur-
ing work.
(The indoor unit is operated by force.)
4 Add the specific amount of refrigerant.
CAUTION
!
- When the green LED of PCB is on,
compressor is going to be off because
of low pressure.
- You should return the Dip Switch to
operate normally after finishing the
operation.
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